Surface-gage



I E UPTON SURFACE GAGE;

(No Model.)

Patent-ed Dec. 2, 1890.

me mmms Pnzns 0a., mow-mu UNITED STATES P TENT OFFICE.

EMORY UPTON, OF BATTLE GREEK, MICHIGAN.

SURFACE-GAG E.

SPECIFICATION forming part of Letters Patent No. 441,812, dated December2, 1890. Application filed April 15. 1890- Serial No. 347,957. (Nomodel.)

To aZZ whom it may concern.-

Be it known that I, EMORY UPION, a citizen of the United States,residing at Battle Creek, in the county of Calhoun and State ofMichigan, have invented certain new and useful Improvements inSurface-Gages; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

My invention relates to surface-gages for machinists use; and the objectthereof is to provide such a device with means by which the needle,index, or measuring-point can be moved and accurately set for themeasurement of surfaces, and also with means for effecting a tineadjustment of the needle when required. With this end in viewIprovide anupright standard with the usual base, and on this standard place a splitclampingband. From one side of the split clamp projects a screw whichpasses through a perforation in the other side or jaw thereof. Acircular countersink or groove is formed in the outer side of theperforated jaw of the clamp for a purpose hereinafter mentioned. Theneedle or measuring-point is carried in a split clamp formed on the endof one arm of a device resembling in appearance a pair ofspring-calipers, and is capable of longitudinal adjustment therein, thesplit clamp being equipped with the usual thumb-screw for forcing theparts thereof together to grasp the needle. The lower arm of this deviceis provided with a convex or rounded projection which accurately fitsthe seat or countersink in the split clamp mounted on the standard. Ascrew of the usual kind projects from a stud on the lower arm of thecalipeulike device, passes through a rocking bearing in the upper armthereof, and above said bearingis equipped with a thumb-screw, by meansof which the upper arm can be adjusted to set the needle to the fineradjustment desired. In virtue of the rounded projection on the lower armof the calipers the device can be swung in a vertical arc and thenproperly clamped in place to secure the needle in the position desired.This projection and seat are also important asa means for keeping themovement in the true are of a circle. By the means described everynecessary adjustment can be given the needle, and when adjusted it canbe securely clamped in position.

In the accompanying drawings, in which like numerals are placed on likeparts th roughout the several figures, Figure l is a perspective view ofmy invention, and Fig. 2 is aseotion on the line a: a: of Fig. 1.

1 is a vertical standard mounted on the usual base 2.

3 is a split-clamp band having a circular portion fitting around thestandard and pro vided with two arms or jaws 4 and 5.

6 is a screw projecting from jaw 4: and passing through a perforation injaw 5, and 7 is a thumb-nut mounted on the screw and serving thepurposes hereinafter described.

8 is the lower arm and 9 the upper arm of a caliper-like device, and 10is a bow-spring connected to the rear ends of said arms. Arm 8 isprovided with a rounded convex projection 11, which fits in a concaveseat 12, formed in arm or jaw 5.

13 is a spring or split clamp formed in the end of arm 9 for thereception of the needle or index 14:, and 15 is a set-screw for clampingthe parts of the split clamp together, and thereby rigidly securing theneedle in position.

16 is a screw held at its lower end in a lug 17, projecting laterallyfrom arm 8.

18 is a rocking bearing on arm 9, through which the screw passes, and 19is a thumbnut for moving arm 9 toward arm 8 to efieet the fineadjustment of the needle.

The operation of the device is manifest from the description set forth,but will be briefly recapitulated as follows: When it is desired to setthe needle at a given height above the base, thumb-nut 7 is turnedbackward to withdraw the pressure from the clamping-jaws 4: and 5, andthe splitclamp is moved either upward or downward on the standard 1 tothe desired position. The caliper-like device is adjustment of theneedle be desired, this can be effected by meansof the screw 16 andthumb-nut 19.

While the spring-calipers are preferred as a means for effecting thefiner adjustment of the needle, yet it is, distinctly to be understoodthat any other suitable form of device capable of effecting this resultcan be adopted as a mechanical substitute, provided it is equipped witha rounded projection fitting the seat in the clamping-band. It isobvious that the rounded projection could be formed on the clamping-bandand the seat in the needle-carrier, or, in other words, that a re: versearrangement to that described and shown could be employed withoutdeparting from my invention.

\Vithout limiting myself to the exact details of construction shown and.described, what I-claim, and desire to secure by Letters Patent, is-

1, A surface-gage consisting of a base, a vertical standard risingtherefrom, a clamping-band adjustable in said standard, provided withtwo arms or jaws, a screw projecting from one j aw through a perforationin the other, a circular concave seat surrounding said perforation, a caiper-like device provided with a projection fitting said seat, a 5

needle carried by said device, and a screw for clamping the partstogether and to the standard, substantially as and for the purposespecified.

v2. In a surface-gage, the combination,with a standard, of a bandadjustable thereon, a pair of hinged calipers adjustable on said band,and a needle carried in one arm of the calipers, substantial] y as andfor the purpose specified.

3. In a surface-gage, the combination,with

a standard, of a pair of spring-calipers, one

arm of which carries the needle, while the other is fitted to thestandard to be adj ustable in a vertical are thereon, substantially asand for the purpose specified.

4:. A surface-gage comprising the following elements in combination,viz: a base, a stand ard, a clamp adjustable on the standard andprovided with a seat, a pair of spriug-calipers, one arm of whichcarries aprojection fitting said seat, a clamp in which the needle canbe adjusted and secured on the other arm of the calipers, and a screwand thumbnut for efiecting the fine adjustment of the needle,substantially as and and for the purpose specified.

In testimony whereof I affiX my signature in presence of two witnesses.1

EMORY UPTON.

Witnesses:

ALBERT C. KINGMAN, A. A. ELLSWORTH.

